Enter your answers to the following in the space below: a) (.25 pt) Which type of heart is more efficient at supplying oxygen to a chordate’s body, a 3-chambered heart or a 4-chambered heart? b) (1 pt) Explain why the heart that you chose in part (a) is more efficient. Please limit your answer to one sentence. 

In module 3 we discussed multistage decision making.  Which of the following is a common technique for evaluating multistage decisions?

All chordates, at some point in their life cycle, share four hallmark characteristics.  One of these characteristics is a postanal tail.  Write two more of these characteristics shared by all chordates in the two blanks provided.  [1] [2]

What traits evolved in Chondricthyes that allowed them to become agile mobile predators of larger prey?

  Select the correct choice  

The nasal turbinates in the nasal cavity affect air in the following ways (select all that apply)

The act of moving the vocal folds together is called _____________.

From the list below, indicate which are cartilages of the larynx:

During early infancy, the lower border of the velum is far away from the upper border of the epiglottis.

The cavity directly between the vocal folds is called the: